Planta Medica 1989-Feb
[Further investigations regarding distribution and structure of the bitter principles from Menyanthes trifoliata].
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Comparison of the methanolic extracts from leaves, stems, and rhizomes of MENYANTHES TRIFOLIATA L. by TLC showed that the main compounds are dihydrofoliamenthin, menthiafolin, and loganin, whereas foliamenthin was lacking. The monoterpene carboxylic acid of dihydrofoliamenthin was determined to be a derivative of nerol and the configuration of carbon 7 of the secoiridoid skeleton was shown to be beta by spectroscopic evidences.